[Tutor] Converting integers into digit sum (Python 3.3.0)

[Wolfgang Maier]

Asokan Pichai <pasokan <at> talentsprint.com> writes:

> 
> If you liked it, I will give you one that uses one less variable 
> 
> def digitSum(n):
>       dsum = 0
>       while n > 0:
>             dsum += n % 10
> 
>             n /= 10
>       return dsum
>
> Stupid of me not to have mentioned that this Python 2.x only. Sorry 
> 

but very easy to fix:

def digitSum(n):
    dsum = 0
    while n > 0:
        dsum += n % 10
        n //= 10        # explicit floor division works in Python2 & 3
    return dsum

Best,
Wolfgang